Malicious PDF — malware analysis report

Static analysis result for SHA-256 d73761dec0c38e74…

MALICIOUS

PDF

78.5 KB Created: 2021-03-16 13:38:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c8da478ab87923955f1c560c1713ff62 SHA-1: ee74ce261cc6a20c68162bcd1b1ac9ff826f256f SHA-256: d73761dec0c38e7401ad41411e2f0ae623795feaf4df92ac44738ade4cf5ae26
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The file is identified as malicious by ML classifiers and ClamAV, with a high risk score. It contains an embedded URL pointing to 'jumiwimov.ru', which is likely used to redirect the user to a phishing or malware-hosting site. The document body, though heavily obfuscated, suggests a lure related to a 'simcity 4 nam guide', indicating a social engineering attempt to trick the user into visiting the malicious URL.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://jumiwimov.ru/wix?keyword=simcity+4+nam+guide
    • http://xefopuro.mypressonline.com/25403869763.pdf
    • http://metalllift.ru/gloomy_sunday_english_songh92hn.pdf
    • https://static.s123-cdn-static.com/uploads/4476443/normal_5fcb719c997ec.pdf
    • http://vubitim.sportsontheweb.net/places_to_donate_furniture_in_nyc.pdf
    • https://cdn-cms.f-static.net/uploads/4387410/normal_6023ba60ca9f5.pdf
    • http://eushopvmn.site/530157078995i0dt.pdf
    • https://cdn-cms.f-static.net/uploads/4481408/normal_5fe6215e05be0.pdf
    • https://cdn-cms.f-static.net/uploads/4369311/normal_6014941f12242.pdf
    • http://all-system7.xyz/dapunojudz18m9.pdf
    • http://ferategaj.scienceontheweb.net/adobe_xd_tutorial.pdf
    • http://reduslimitalia-official.website/honeywell_th4110d1007_pro_4000_52_day_programmable_thermostatrnnx1.pdf
    • https://cdn-cms.f-static.net/uploads/4383801/normal_604498726d6d3.pdf
    • http://femuxeririta.mygamesonline.org/wezaxi.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/norozovijalu/91264084877.pdf
    • https://5cbbff6b-7c47-4fbb-abda-9de5069fbc88.filesusr.com/ugd/1a89c8_b202a36d4a224c969adb5c7ffc3e4f9d.pdf?index=true
    • https://s3.amazonaws.com/rutufokedizon/legevik.pdf
    • https://s3.amazonaws.com/nazekisigiduz/gawipuziviziwuxezuwap.pdf
    • https://4f65703b-d4c0-4c9c-9e30-73c8cc83ec5d.filesusr.com/ugd/54fa57_181f3e589fcd47038cfbc3b9ea26029b.pdf?index=true
    • https://s3.amazonaws.com/jevedijadiki/cronograma_de_projeto_template.pdf
    • https://e590c0d9-b694-44fb-9862-47327b30d8b0.filesusr.com/ugd/89363e_2df68312e31f42b5825126bb534d4210.pdf?index=true
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f3c2.bin
7645e9c938a884cc63412cdbbe15b572088a4fd2ac272f507293cdf6e7f9a2df
pdf-font-stream PDF embedded font (sfnt) at offset 0xF3C2 5244 bytes
font_01_sfnt_off0001059a.bin
f407b45a9db67fe011e9e9a79e95bdf4a70ea1540f68e33b9e8814be7bbee568
pdf-font-stream PDF embedded font (sfnt) at offset 0x1059A 11568 bytes